May 1992

3

Philips Semiconductors

Product specification

Decoder for traffic warning (VWF) radio

transmissions

TDA1579

TDA1579T

RATINGS

Limiting values in accordance with the Absolute Maximum System (IEC 134). All pin numbers in this table apply to

TDA1579; for TDA1579T refer to Fig.1.

CHARACTERISTICS

All pin numbers in this table apply to TDA1579, for TDA1579T refer to Fig.1.

PARAMETER

CONDITIONS

SYMBOL

MIN.

TYP.

MAX.

UNIT

Supply voltage

pin 7

−−

15

V

Switch output voltage

pin 1

−−

23

V

pins 2 or 3

−−

15

V

pins 1, 2 or 3

−−

0.5

V

Switch output current

pin 1

−−

50

mA

pins 2 or 3

−−

5mA

pins 1, 2 or 3

−−

10

mA

Signal input voltage

pin 13

−−

pin 13

−−

0.5

V

Signal input current

pin 13

−−

10

mA

Total power dissipation

−−

800

mW

Storage temperature

range

−55

−+150

°C

Operating ambient

temperature range

−30

−+ 80

°C

PARAMETER

CONDITIONS

SYMBOL

MIN.

TYP.

MAX.

UNIT

Supply voltage

pin 7

7.5

−

12

V

Supply current

pin 7

−

610

mA

SK amplifier/decoder

Input impedance

f

≤ 57 kHz

100

−−

k

Ω

Input voltage (peak-to-

peak value)

2

−−

V

Input voltage at start of

gain control

−

2.4*

−

mV

Voltage gain

−

44*

−

dB

Gain spread

−−

2dB

Gain control range

40

−−

dB

Controlled output voltage

−

440

−

mV

−

220

−

mV